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19 May, 02:42

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop?

A. 376.5 Pa

B. 73.5 Pa

C. 226.5 Pa

D. 122.5 Pa

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Answers (1)
  1. 19 May, 04:12
    0
    Pressure is defined as the force per unit area. This measurement is more convenient to use for describing a force exerted. The standard unit for pressure is Pascal. For this problem, force is the gravitational pull from the block. Calculations are as follows:

    P = F/A where F = mg

    F = 7.5 (9.81) = 73.6 N

    P = 73.6 N / 0.6 m^2 = 122.5 Pa

    Thus, the answer is D.
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